<template>
  <div cclass="app-container">
    <br>
     <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a :href="'/static/01.xlsx'">点击下载模版</a>
        </el-tag>

      </el-form-item>

    <el-form-item label="选择文件">
        <el-upload
        ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'/eduservice/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel">
            <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
            <el-button 
            :loading="loading"
            style="margin-left: 10px;" 
            size="small" 
            type="success" 
            @click="submitUpload">上传到服务器</el-button>
            <div slot="tip" class="el-upload__tip">只能上传execl文件</div>
        </el-upload>
     </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
    data() {
        return {
            BASE_API: process.env.BASE_API, // 接口API地址
            importBtnDisabled: false, // 按钮是否禁用,
            loading: false
        }
    },
    created() {
        
    },
    methods: {
        // 上传文件到接口 表单提交
        submitUpload(){
            this.importBtnDisabled =true
            this.loading =true
            this.$refs.upload.submit()
        },
        // 上传成功
        fileUploadSuccess(){
            this.$message({ 
                type: 'success',
                message: '添加课程分类成功'
            });
            this.$router.push({path:'/subject/list'})
        },
        // 上传失败
        fileUploadError(){
             this.$message({ 
                type: 'success',
                message: '添加课程分类失败'
            });
        }
    }
};
</script>

